diff --git a/block/blk-core.c b/block/blk-core.c
index 72b102a389a5..6d4c57ef4533 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -674,7 +674,7 @@ bool bio_attempt_back_merge(struct request *req, struct bio *bio,
 	if (!ll_back_merge_fn(req, bio, nr_segs))
 		return false;
 
-	trace_block_bio_backmerge(req->q, req, bio);
+	trace_block_bio_backmerge(bio);
 	rq_qos_merge(req->q, req, bio);
 
 	if ((req->cmd_flags & REQ_FAILFAST_MASK) != ff)
@@ -698,7 +698,7 @@ bool bio_attempt_front_merge(struct request *req, struct bio *bio,
 	if (!ll_front_merge_fn(req, bio, nr_segs))
 		return false;
 
-	trace_block_bio_frontmerge(req->q, req, bio);
+	trace_block_bio_frontmerge(bio);
 	rq_qos_merge(req->q, req, bio);
 
 	if ((req->cmd_flags & REQ_FAILFAST_MASK) != ff)
@@ -1082,7 +1082,7 @@ generic_make_request_checks(struct bio *bio)
 		return false;
 
 	if (!bio_flagged(bio, BIO_TRACE_COMPLETION)) {
-		trace_block_bio_queue(q, bio);
+		trace_block_bio_queue(bio);
 		/* Now that enqueuing has been traced, we need to trace
 		 * completion as well.
 		 */
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 9c9fb21584b6..8333ccd60ee1 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -337,7 +337,7 @@ void __blk_queue_split(struct request_queue *q, struct bio **bio,
 		split->bi_opf |= REQ_NOMERGE;
 
 		bio_chain(split, *bio);
-		trace_block_split(q, split, (*bio)->bi_iter.bi_sector);
+		trace_block_split(split, (*bio)->bi_iter.bi_sector);
 		generic_make_request(*bio);
 		*bio = split;
 	}
@@ -793,7 +793,7 @@ static struct request *attempt_merge(struct request_queue *q,
 	 */
 	blk_account_io_merge_request(next);
 
-	trace_block_rq_merge(q, next);
+	trace_block_rq_merge(next);
 
 	/*
 	 * ownership of bio passed from next to req, return 'next' for
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index fdcc2c1dd178..a3cade16ef80 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -409,7 +409,7 @@ EXPORT_SYMBOL_GPL(blk_mq_sched_try_insert_merge);
 
 void blk_mq_sched_request_inserted(struct request *rq)
 {
-	trace_block_rq_insert(rq->q, rq);
+	trace_block_rq_insert(rq);
 }
 EXPORT_SYMBOL_GPL(blk_mq_sched_request_inserted);
 
diff --git a/block/blk-mq.c b/block/blk-mq.c
index b8738b3c6d06..dbb98b2bc868 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -742,7 +742,7 @@ void blk_mq_start_request(struct request *rq)
 {
 	struct request_queue *q = rq->q;
 
-	trace_block_rq_issue(q, rq);
+	trace_block_rq_issue(rq);
 
 	if (test_bit(QUEUE_FLAG_STATS, &q->queue_flags)) {
 		rq->io_start_time_ns = ktime_get_ns();
@@ -769,7 +769,7 @@ static void __blk_mq_requeue_request(struct request *rq)
 
 	blk_mq_put_driver_tag(rq);
 
-	trace_block_rq_requeue(q, rq);
+	trace_block_rq_requeue(rq);
 	rq_qos_requeue(q, rq);
 
 	if (blk_mq_request_started(rq)) {
@@ -1758,7 +1758,7 @@ static inline void __blk_mq_insert_req_list(struct blk_mq_hw_ctx *hctx,
 
 	lockdep_assert_held(&ctx->lock);
 
-	trace_block_rq_insert(hctx->queue, rq);
+	trace_block_rq_insert(rq);
 
 	if (at_head)
 		list_add(&rq->queuelist, &ctx->rq_lists[type]);
@@ -1814,7 +1814,7 @@ void blk_mq_insert_requests(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx,
 	 */
 	list_for_each_entry(rq, list, queuelist) {
 		BUG_ON(rq->mq_ctx != ctx);
-		trace_block_rq_insert(hctx->queue, rq);
+		trace_block_rq_insert(rq);
 	}
 
 	spin_lock(&ctx->lock);
@@ -2111,7 +2111,7 @@ blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
 		goto queue_exit;
 	}
 
-	trace_block_getrq(q, bio, bio->bi_opf);
+	trace_block_getrq(bio, bio->bi_opf);
 
 	rq_qos_track(q, rq, bio);
 
diff --git a/block/bounce.c b/block/bounce.c
index c3aaed070124..9550640b1f86 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -341,7 +341,7 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
 		}
 	}
 
-	trace_block_bio_bounce(q, *bio_orig);
+	trace_block_bio_bounce(*bio_orig);
 
 	bio->bi_flags |= (1 << BIO_BOUNCED);
 
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 109e81f33edb..4b9ff226904d 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1678,7 +1678,7 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md,
 				part_stat_unlock();
 
 				bio_chain(b, bio);
-				trace_block_split(md->queue, b, bio->bi_iter.bi_sector);
+				trace_block_split(b, bio->bi_iter.bi_sector);
 				ret = generic_make_request(bio);
 				break;
 			}
@@ -1745,7 +1745,7 @@ static void dm_queue_split(struct mapped_device *md, struct dm_target *ti, struc
 		struct bio *split = bio_split(*bio, len, GFP_NOIO, &md->queue->bio_split);
 
 		bio_chain(split, *bio);
-		trace_block_split(md->queue, split, (*bio)->bi_iter.bi_sector);
+		trace_block_split(split, (*bio)->bi_iter.bi_sector);
 		generic_make_request(*bio);
 		*bio = split;
 	}
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index 34d64ca306b1..237d40a48429 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -64,7 +64,6 @@ DEFINE_EVENT(block_buffer, block_dirty_buffer,
 
 /**
  * block_rq_requeue - place block IO request back on a queue
- * @q: queue holding operation
  * @rq: block IO operation request
  *
  * The block operation request @rq is being placed back into queue
@@ -73,9 +72,9 @@ DEFINE_EVENT(block_buffer, block_dirty_buffer,
  */
 TRACE_EVENT(block_rq_requeue,
 
-	TP_PROTO(struct request_queue *q, struct request *rq),
+	TP_PROTO(struct request *rq),
 
-	TP_ARGS(q, rq),
+	TP_ARGS(rq),
 
 	TP_STRUCT__entry(
 		__field(  dev_t,	dev			)
@@ -103,7 +102,6 @@ TRACE_EVENT(block_rq_requeue,
 
 /**
  * block_rq_complete - block IO operation completed by device driver
- * @rq: block operations request
  * @error: status code
  * @nr_bytes: number of completed bytes
  *
@@ -147,9 +145,9 @@ TRACE_EVENT(block_rq_complete,
 
 DECLARE_EVENT_CLASS(block_rq,
 
-	TP_PROTO(struct request_queue *q, struct request *rq),
+	TP_PROTO(struct request *rq),
 
-	TP_ARGS(q, rq),
+	TP_ARGS(rq),
 
 	TP_STRUCT__entry(
 		__field(  dev_t,	dev			)
@@ -181,24 +179,22 @@ DECLARE_EVENT_CLASS(block_rq,
 
 /**
  * block_rq_insert - insert block operation request into queue
- * @q: target queue
  * @rq: block IO operation request
  *
  * Called immediately before block operation request @rq is inserted
- * into queue @q.  The fields in the operation request @rq struct can
+ * into queue.  The fields in the operation request @rq struct can
  * be examined to determine which device and sectors the pending
  * operation would access.
  */
 DEFINE_EVENT(block_rq, block_rq_insert,
 
-	TP_PROTO(struct request_queue *q, struct request *rq),
+	TP_PROTO(struct request *rq),
 
-	TP_ARGS(q, rq)
+	TP_ARGS(rq)
 );
 
 /**
  * block_rq_issue - issue pending block IO request operation to device driver
- * @q: queue holding operation
  * @rq: block IO operation operation request
  *
  * Called when block operation request @rq from queue @q is sent to a
@@ -206,32 +202,30 @@ DEFINE_EVENT(block_rq, block_rq_insert,
  */
 DEFINE_EVENT(block_rq, block_rq_issue,
 
-	TP_PROTO(struct request_queue *q, struct request *rq),
+	TP_PROTO(struct request *rq),
 
-	TP_ARGS(q, rq)
+	TP_ARGS(rq)
 );
 
 /**
  * block_rq_merge - merge request with another one in the elevator
- * @q: queue holding operation
  * @rq: block IO operation operation request
  *
- * Called when block operation request @rq from queue @q is merged to another
+ * Called when block operation request @rq from queue is merged to another
  * request queued in the elevator.
  */
 DEFINE_EVENT(block_rq, block_rq_merge,
 
-	TP_PROTO(struct request_queue *q, struct request *rq),
+	TP_PROTO(struct request *rq),
 
-	TP_ARGS(q, rq)
+	TP_ARGS(rq)
 );
 
 /**
  * block_bio_bounce - used bounce buffer when processing block operation
- * @q: queue holding the block operation
  * @bio: block operation
  *
- * A bounce buffer was used to handle the block operation @bio in @q.
+ * A bounce buffer was used to handle the block operation @bio in queue.
  * This occurs when hardware limitations prevent a direct transfer of
  * data between the @bio data memory area and the IO device.  Use of a
  * bounce buffer requires extra copying of data and decreases
@@ -239,9 +233,9 @@ DEFINE_EVENT(block_rq, block_rq_merge,
  */
 TRACE_EVENT(block_bio_bounce,
 
-	TP_PROTO(struct request_queue *q, struct bio *bio),
+	TP_PROTO(struct bio *bio),
 
-	TP_ARGS(q, bio),
+	TP_ARGS(bio),
 
 	TP_STRUCT__entry(
 		__field( dev_t,		dev			)
@@ -303,9 +297,9 @@ TRACE_EVENT(block_bio_complete,
 
 DECLARE_EVENT_CLASS(block_bio_merge,
 
-	TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
+	TP_PROTO(struct bio *bio),
 
-	TP_ARGS(q, rq, bio),
+	TP_ARGS(bio),
 
 	TP_STRUCT__entry(
 		__field( dev_t,		dev			)
@@ -331,48 +325,43 @@ DECLARE_EVENT_CLASS(block_bio_merge,
 
 /**
  * block_bio_backmerge - merging block operation to the end of an existing operation
- * @q: queue holding operation
- * @rq: request bio is being merged into
  * @bio: new block operation to merge
  *
  * Merging block request @bio to the end of an existing block request
- * in queue @q.
+ * in queue.
  */
 DEFINE_EVENT(block_bio_merge, block_bio_backmerge,
 
-	TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
+	TP_PROTO(struct bio *bio),
 
-	TP_ARGS(q, rq, bio)
+	TP_ARGS(bio)
 );
 
 /**
  * block_bio_frontmerge - merging block operation to the beginning of an existing operation
- * @q: queue holding operation
- * @rq: request bio is being merged into
  * @bio: new block operation to merge
  *
  * Merging block IO operation @bio to the beginning of an existing block
- * operation in queue @q.
+ * operation in queue.
  */
 DEFINE_EVENT(block_bio_merge, block_bio_frontmerge,
 
-	TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
+	TP_PROTO(struct bio *bio),
 
-	TP_ARGS(q, rq, bio)
+	TP_ARGS(bio)
 );
 
 /**
  * block_bio_queue - putting new block IO operation in queue
- * @q: queue holding operation
  * @bio: new block operation
  *
- * About to place the block IO operation @bio into queue @q.
+ * About to place the block IO operation @bio into queue.
  */
 TRACE_EVENT(block_bio_queue,
 
-	TP_PROTO(struct request_queue *q, struct bio *bio),
+	TP_PROTO(struct bio *bio),
 
-	TP_ARGS(q, bio),
+	TP_ARGS(bio),
 
 	TP_STRUCT__entry(
 		__field( dev_t,		dev			)
@@ -398,9 +387,9 @@ TRACE_EVENT(block_bio_queue,
 
 DECLARE_EVENT_CLASS(block_get_rq,
 
-	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
+	TP_PROTO(struct bio *bio, int rw),
 
-	TP_ARGS(q, bio, rw),
+	TP_ARGS(bio, rw),
 
 	TP_STRUCT__entry(
 		__field( dev_t,		dev			)
@@ -427,36 +416,34 @@ DECLARE_EVENT_CLASS(block_get_rq,
 
 /**
  * block_getrq - get a free request entry in queue for block IO operations
- * @q: queue for operations
  * @bio: pending block IO operation (can be %NULL)
  * @rw: low bit indicates a read (%0) or a write (%1)
  *
- * A request struct for queue @q has been allocated to handle the
+ * A request struct for queue has been allocated to handle the
  * block IO operation @bio.
  */
 DEFINE_EVENT(block_get_rq, block_getrq,
 
-	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
+	TP_PROTO(struct bio *bio, int rw),
 
-	TP_ARGS(q, bio, rw)
+	TP_ARGS(bio, rw)
 );
 
 /**
  * block_sleeprq - waiting to get a free request entry in queue for block IO operation
- * @q: queue for operation
  * @bio: pending block IO operation (can be %NULL)
  * @rw: low bit indicates a read (%0) or a write (%1)
  *
- * In the case where a request struct cannot be provided for queue @q
+ * In the case where a request struct cannot be provided for queue
  * the process needs to wait for an request struct to become
  * available.  This tracepoint event is generated each time the
  * process goes to sleep waiting for request struct become available.
  */
 DEFINE_EVENT(block_get_rq, block_sleeprq,
 
-	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
+	TP_PROTO(struct bio *bio, int rw),
 
-	TP_ARGS(q, bio, rw)
+	TP_ARGS(bio, rw)
 );
 
 /**
@@ -521,7 +508,6 @@ DEFINE_EVENT(block_unplug, block_unplug,
 
 /**
  * block_split - split a single bio struct into two bio structs
- * @q: queue containing the bio
  * @bio: block operation being split
  * @new_sector: The starting sector for the new bio
  *
@@ -532,10 +518,9 @@ DEFINE_EVENT(block_unplug, block_unplug,
  */
 TRACE_EVENT(block_split,
 
-	TP_PROTO(struct request_queue *q, struct bio *bio,
-		 unsigned int new_sector),
+	TP_PROTO(struct bio *bio, unsigned int new_sector),
 
-	TP_ARGS(q, bio, new_sector),
+	TP_ARGS(bio, new_sector),
 
 	TP_STRUCT__entry(
 		__field( dev_t,		dev				)
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 7ba62d68885a..7b72781a591d 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -28,6 +28,11 @@
 
 #ifdef CONFIG_BLK_DEV_IO_TRACE
 
+static inline struct request_queue *bio_q(struct bio *bio)
+{
+	return bio->bi_disk->queue;
+}
+
 static unsigned int blktrace_seq __read_mostly = 1;
 
 static struct trace_array *blk_tr;
@@ -846,33 +851,28 @@ static void blk_add_trace_rq(struct request *rq, int error,
 	rcu_read_unlock();
 }
 
-static void blk_add_trace_rq_insert(void *ignore,
-				    struct request_queue *q, struct request *rq)
+static void blk_add_trace_rq_insert(void *ignore, struct request *rq)
 {
 	blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_INSERT,
-			 blk_trace_request_get_cgid(q, rq));
+			 blk_trace_request_get_cgid(rq->q, rq));
 }
 
-static void blk_add_trace_rq_issue(void *ignore,
-				   struct request_queue *q, struct request *rq)
+static void blk_add_trace_rq_issue(void *ignore, struct request *rq)
 {
 	blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_ISSUE,
-			 blk_trace_request_get_cgid(q, rq));
+			 blk_trace_request_get_cgid(rq->q, rq));
 }
 
-static void blk_add_trace_rq_merge(void *ignore,
-				   struct request_queue *q, struct request *rq)
+static void blk_add_trace_rq_merge(void *ignore, struct request *rq)
 {
 	blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_BACKMERGE,
-			 blk_trace_request_get_cgid(q, rq));
+			 blk_trace_request_get_cgid(rq->q, rq));
 }
 
-static void blk_add_trace_rq_requeue(void *ignore,
-				     struct request_queue *q,
-				     struct request *rq)
+static void blk_add_trace_rq_requeue(void *ignore, struct request *rq)
 {
 	blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_REQUEUE,
-			 blk_trace_request_get_cgid(q, rq));
+			 blk_trace_request_get_cgid(rq->q, rq));
 }
 
 static void blk_add_trace_rq_complete(void *ignore, struct request *rq,
@@ -893,13 +893,12 @@ static void blk_add_trace_rq_complete(void *ignore, struct request *rq,
  *     Records an action against a bio. Will log the bio offset + size.
  *
  **/
-static void blk_add_trace_bio(struct request_queue *q, struct bio *bio,
-			      u32 what, int error)
+static void blk_add_trace_bio(struct bio *bio, u32 what, int error)
 {
 	struct blk_trace *bt;
 
 	rcu_read_lock();
-	bt = rcu_dereference(q->blk_trace);
+	bt = rcu_dereference(bio_q(bio)->blk_trace);
 	if (likely(!bt)) {
 		rcu_read_unlock();
 		return;
@@ -907,56 +906,59 @@ static void blk_add_trace_bio(struct request_queue *q, struct bio *bio,
 
 	__blk_add_trace(bt, bio->bi_iter.bi_sector, bio->bi_iter.bi_size,
 			bio_op(bio), bio->bi_opf, what, error, 0, NULL,
-			blk_trace_bio_get_cgid(q, bio));
+			blk_trace_bio_get_cgid(bio_q(bio), bio));
 	rcu_read_unlock();
 }
 
-static void blk_add_trace_bio_bounce(void *ignore,
-				     struct request_queue *q, struct bio *bio)
+static void blk_add_trace_bio_bounce(void *ignore, struct bio *bio)
 {
-	blk_add_trace_bio(q, bio, BLK_TA_BOUNCE, 0);
+	blk_add_trace_bio(bio, BLK_TA_BOUNCE, 0);
 }
 
-static void blk_add_trace_bio_complete(void *ignore,
-				       struct request_queue *q, struct bio *bio)
+static void blk_add_trace_bio_complete(void *ignore, struct request_queue *q,
+				       struct bio *bio)
 {
-	blk_add_trace_bio(q, bio, BLK_TA_COMPLETE,
-			  blk_status_to_errno(bio->bi_status));
+	struct blk_trace *bt;
+
+	rcu_read_lock();
+	bt = rcu_dereference(q->blk_trace);
+	if (likely(!bt)) {
+		rcu_read_unlock();
+		return;
+	}
+
+	__blk_add_trace(bt, bio->bi_iter.bi_sector, bio->bi_iter.bi_size,
+			bio_op(bio), bio->bi_opf, BLK_TA_COMPLETE,
+			blk_status_to_errno(bio->bi_status), 0, NULL,
+			blk_trace_bio_get_cgid(q, bio));
+	rcu_read_unlock();
 }
 
-static void blk_add_trace_bio_backmerge(void *ignore,
-					struct request_queue *q,
-					struct request *rq,
-					struct bio *bio)
+static void blk_add_trace_bio_backmerge(void *ignore, struct bio *bio)
 {
-	blk_add_trace_bio(q, bio, BLK_TA_BACKMERGE, 0);
+	blk_add_trace_bio(bio, BLK_TA_BACKMERGE, 0);
 }
 
-static void blk_add_trace_bio_frontmerge(void *ignore,
-					 struct request_queue *q,
-					 struct request *rq,
-					 struct bio *bio)
+static void blk_add_trace_bio_frontmerge(void *ignore, struct bio *bio)
 {
-	blk_add_trace_bio(q, bio, BLK_TA_FRONTMERGE, 0);
+	blk_add_trace_bio(bio, BLK_TA_FRONTMERGE, 0);
 }
 
-static void blk_add_trace_bio_queue(void *ignore,
-				    struct request_queue *q, struct bio *bio)
+static void blk_add_trace_bio_queue(void *ignore, struct bio *bio)
 {
-	blk_add_trace_bio(q, bio, BLK_TA_QUEUE, 0);
+	blk_add_trace_bio(bio, BLK_TA_QUEUE, 0);
 }
 
 static void blk_add_trace_getrq(void *ignore,
-				struct request_queue *q,
 				struct bio *bio, int rw)
 {
 	if (bio)
-		blk_add_trace_bio(q, bio, BLK_TA_GETRQ, 0);
+		blk_add_trace_bio(bio, BLK_TA_GETRQ, 0);
 	else {
 		struct blk_trace *bt;
 
 		rcu_read_lock();
-		bt = rcu_dereference(q->blk_trace);
+		bt = rcu_dereference(bio_q(bio)->blk_trace);
 		if (bt)
 			__blk_add_trace(bt, 0, 0, rw, 0, BLK_TA_GETRQ, 0, 0,
 					NULL, 0);
@@ -965,17 +967,15 @@ static void blk_add_trace_getrq(void *ignore,
 }
 
 
-static void blk_add_trace_sleeprq(void *ignore,
-				  struct request_queue *q,
-				  struct bio *bio, int rw)
+static void blk_add_trace_sleeprq(void *ignore, struct bio *bio, int rw)
 {
 	if (bio)
-		blk_add_trace_bio(q, bio, BLK_TA_SLEEPRQ, 0);
+		blk_add_trace_bio(bio, BLK_TA_SLEEPRQ, 0);
 	else {
 		struct blk_trace *bt;
 
 		rcu_read_lock();
-		bt = rcu_dereference(q->blk_trace);
+		bt = rcu_dereference(bio_q(bio)->blk_trace);
 		if (bt)
 			__blk_add_trace(bt, 0, 0, rw, 0, BLK_TA_SLEEPRQ,
 					0, 0, NULL, 0);
@@ -1015,14 +1015,12 @@ static void blk_add_trace_unplug(void *ignore, struct request_queue *q,
 	rcu_read_unlock();
 }
 
-static void blk_add_trace_split(void *ignore,
-				struct request_queue *q, struct bio *bio,
-				unsigned int pdu)
+static void blk_add_trace_split(void *ignore, struct bio *bio, unsigned int pdu)
 {
 	struct blk_trace *bt;
 
 	rcu_read_lock();
-	bt = rcu_dereference(q->blk_trace);
+	bt = rcu_dereference(bio_q(bio)->blk_trace);
 	if (bt) {
 		__be64 rpdu = cpu_to_be64(pdu);
 
@@ -1031,7 +1029,7 @@ static void blk_add_trace_split(void *ignore,
 				BLK_TA_SPLIT,
 				blk_status_to_errno(bio->bi_status),
 				sizeof(rpdu), &rpdu,
-				blk_trace_bio_get_cgid(q, bio));
+				blk_trace_bio_get_cgid(bio_q(bio), bio));
 	}
 	rcu_read_unlock();
 }
